Seasonic Platinum Series Fanless 520 W Review

Name: Seasonic Platinum Series Fanless 520 W
Brand: Seasonic

crmaris

on Nov 14th, 2012,

in Power Supplies.

Manufacturer: Seasonic

Performance Rating & Performance per Dollar »

Ripple Measurements

You will see the ripple levels that we measured on the main rails of the SS-520FL in the following table. The limits are, according to the ATX specifications, 120 mV (+12V) and 50 mV (5V, 3.3V, and 5VSB).

Ripple Measurements Seasonic SS-520FL
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
20% Load	16.8 mV	11.1 mV	8.1 mV	4.5 mV	Pass
40% Load	21.7 mV	11.2 mV	8.5 mV	4.9 mV	Pass
50% Load	24.5 mV	11.4 mV	8.6 mV	5.1 mV	Pass
60% Load	26.1 mV	11.5 mV	8.7 mV	5.3 mV	Pass
80% Load	26.6 mV	12.1 mV	8.8 mV	5.8 mV	Pass
100% Load	29.8 mV	12.9 mV	9.2 mV	7.3 mV	Pass
110% Load	32.1 mV	13.0 mV	9.9 mV	7.8 mV	Pass
Crossload 1	19.3 mV	12.6 mV	8.9 mV	7.2 mV	Pass
Crossload 2	30.0 mV	11.4 mV	9.4 mV	7.4 mV	Pass

Ripple suppression is superb, even with the stress we applied to the PSU during testing. Seasonic has, once again, done an excellent job of assembling a ripple-proof platform that delivers ultra-clean outputs in every case. This means that your sensitive components will only be stressed minimally, which translates into a far more stable operation, even with heavily overlocked system components.

Ripple at Full Load

In the following oscilloscope screenshots, you can see the AC ripple and noise that the main rails registered (+12V, 5V, 3.3V, and 5VSB). The bigger the fluctuations on the oscilloscope's screen, the bigger the ripple/noise. For all measurements, we set 0.01 V/Div (each vertical division/box equals to 0.01 V) as standard.